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Teleostei (teleosts) > Anabantiformes (Gouramies, snakeheads) > Osphronemidae (Gouramies) > Macropodusinae
Etymology: Betta: Malay/Javanese origin. Bleeker (1850, 1858) indicates Ikan Wadder Bettah as the local name of Betta trifasciata Bleeker, 1849 (now Betta picta, Valenciennes, 1846) in the Ambarawa Javanese dialect. Ikan Wader is a common Javanese name for smaller freshwater fishes, especially cyprinids (already used in Old Javanese). See Blust, R. & Trussel, S. Austronesian Comparative Dictionary. Web Edition (https://www.trussel2.com/acd/); ibanorum: Iban is the vernacular for the indigenous people of northwestern Borneo.
Eponymy: The Ibans, also called Sea Dayaks, are an indigenous people of northwestern Borneo, where this species occurs. (Ref. 128868), visit book page.

Environment: milieu / climate zone / depth range / distribution range Ecology

Freshwater; benthopelagic. Tropical

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Asia: southern Sarawak, Malaysia.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 8.1 cm SL male/unsexed; (Ref. 55025)

Short description Identification keys | Morphology | Morphometrics

Dorsal spines (total): 1; Dorsal soft rays (total): 8 - 10; Anal spines: 1 - 2; Anal soft rays: 25 - 27; Vertebrae: 30 - 32. Differs from other members of the species group by the following combination of characters: opercle without second postorbital stripe; eye color yellow when live; anal fin rays 27-29 (mode 28); subdorsal scales 5-6 (mode 5); lateral scales 30-32 (mode 30); predorsal scales 21-23 (mode 22); postdorsal scales 10-11 (mode 11); preanal length 45.8-49.4% SL; head length 31.7-36.4% SL; anal fin base length 50.0-55.8% SL (Ref. 55025).

Facultative air-breathing (Ref. 126274); Found only in blackwater habitats, with water tinged orange in color due to leaching of tannins from dead plant matter and peat (Ref. 55025). Observed as paternal oral brooder with the typical egg-chase (Ref. 55025). Also Ref. 84801.

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

Tan, H.H. and P.K.L. Ng, 2004. Two new species of freshwater fish (Teleostei: Balitoridae, Osphronemidae) from southern Sarawak. p. 267-284. In H.S. Yong, F.S.P. Ng and E.E.L. Yen (eds.) Sarawak Bau Limestone Biodiversity. The Sarawak Museum Journal 59(80) (New Series); Special Issue No. 6. (Ref. 55025)

IUCN Red List Status (Ref. 130435: Version 2024-2)

Vulnerable (VU) (B1ab(iii)); Date assessed: 24 December 2018

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

FAO - Publication: search | FishSource |

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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.01000 (0.00377 - 0.02651), b=2.97 (2.74 - 3.20), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.3 ±0.4 se; based on size and trophs of closest relatives

Resilience (Ref. 120179): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).

Fishing Vulnerability (Ref. 59153): Low vulnerability (10 of 100).

Betta ibanorum Tan & Ng, 2004